ISO TASMANIAN WOLF the upper incisors are never less than three, and may be as many as five in the upper jaw and six in the lower. The canines are trenchant. There is no caecum. The genus Thylaainus con- tains but a single species, which is now limited to Tas- mania, and is generally known as the Tasmanian "Wolf. It has the build of an ordinary Wolf, and is of about the same size. The hinder part of the body is marked with a series of black transverse bands. The hallux is entirely wanting; the pouch opens backwards. The mar- supial bones are minute and The dental formula is I -|- C -J- Pm |- M -f = 46. There FIG. 77.—Front view of skull of Koala (Phas- colarctos ainereus), illustrating Diprotodont and herbivorous dentition. (From Flower.) tin ossified. M3S JS& so[uamosal*; Vot vomer. (From Flower's Osteology.} This animal, now confined to Tasmania, are four mammae.